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Audax Novus by A-01 reviews
A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 26 - Words: 676,710 - Reviews: 836 - Favs: 1,927 - Follows: 2,355 - Updated: 11h - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
Mario Effect by OroDeus reviews
Haunted by visions of impending doom, Mario summons his ragtag team of explorers to adventure. Their journey across the stars will uncover the koopa king's horrible plot to take over the galaxy.
Crossover - Mario & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 15 - Words: 18,263 - Reviews: 8 - Favs: 4 - Follows: 7 - Updated: 16h - Published: 12/27/2023 - Mario, Luigi, Daisy, Toad
The Rook by Twisted Fate MK 2 reviews
On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, right in the midst of the Reaper War. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix. (Redo of an older story)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure - Chapters: 39 - Words: 138,364 - Reviews: 222 - Favs: 696 - Follows: 987 - Updated: 2/15 - Published: 7/8/2022 - Rookie, Shepard
Galactic Conflicts: Tales of First Contact by TheDoctor1998 reviews
Humanity and its allies have stood strong after the Great War with the Covenant. Follow the Systems Alliance as it goes through a first contact nearly as disastrous as the one that lead to the Great War.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 17 - Words: 99,268 - Reviews: 413 - Favs: 605 - Follows: 852 - Updated: 2/15 - Published: 2/6/2023
Into the Howling Dark by long night of solace reviews
Hundreds of millions of years ago, Humanity, Forerunners and the SanShyuum, the tier-1 species protected the galaxy. But the peace never lasted as the threat of flood and the reapers brought the Milkyway to the edge of extinction. Now the warriors of the past needs to guide the future galaxy and stop history from repeating itself.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 71,265 - Reviews: 77 - Favs: 187 - Follows: 255 - Updated: 2/15 - Published: 10/23/2024 - Master Chief/John-117, Didact, D. Anderson, Shepard
An intriguing result by ReligiousZealot reviews
The Turians, the military arm of the Council and the galaxy's peacekeepers, initially stood alone during their encounter with the Council. However, what if they hadn't been alone? What if their first contact wasn't solely with the Council? Imagine if they had an unexpected ally—a species unlike any other: the Zerg collective
Crossover - StarCraft & Mass Effect - Rated: T - English - Mystery/Suspense - Chapters: 8 - Words: 14,950 - Reviews: 27 - Favs: 85 - Follows: 120 - Updated: 2/14 - Published: 5/14/2024
Saiyan Effect by bored peasant reviews
The Citadel Council weren't ready for a species with the power of the saiyans at their back.
Crossover - Mass Effect & Dragon Ball Super - Rated: T - English - Sci-Fi/Adventure - Chapters: 25 - Words: 150,917 - Reviews: 990 - Favs: 2,335 - Follows: 2,779 - Updated: 2/14 - Published: 8/9/2017 - Son Gohan, Son Goku, Vegeta
Mass Effect: A Custodian's Tale by Glader96 reviews
The Adeptus Custodes. The Talons of the Emperor. The Emperor's Legion. Bar the Primarchs, the 10000 are the greatest warriors sworn to the Master of Mankind. For so long they did not concern themselves with the galaxy beyond Sol, after the Fall of Cadia they now depart the Throne World to wage war. One of their kind finds himself in a galaxy so very different from what he knows.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 4 - Words: 9,316 - Reviews: 51 - Favs: 48 - Follows: 66 - Updated: 2/14 - Published: 1/30 - The Emperor, Garrus V., Miranda L., Shepard
First Contact with the Angels by AntrosAscended reviews
Horus rebelled against the machinations of Chaos and sacrificed himself for the Galaxy; Lorgar's Rebellion finally seems to have become a distant memory for the Imperium. On the 30th Anniversary of the Warmaster's death, a new swath of space would be found by accident, setting new possibilities or new failures in motion. I'm Antros. I'm back to remake my first story
Crossover - Warhammer & Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 8 - Words: 85,250 - Reviews: 190 - Favs: 443 - Follows: 595 - Updated: 2/13 - Published: 1/10/2024 - Space Marines, Primarch/s, Councilor Tevos, Councilor Sparatus
Terran Federation: Counterstrike by L4 of the WEST reviews
It's been 8 years since the end of the 2nd Bug war. Humanity is starting to enter its golden age in the galactic stage, with technology no one can replicate, with allies that no one has accepted, and a military capable of taking on any competitor it seems. But that will change, those who employ chains are circling like wolves, and an enemy thought dead return
Crossover - Starship Troopers & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 23 - Words: 168,342 - Reviews: 195 - Favs: 677 - Follows: 739 - Updated: 2/12 - Published: 2/16/2017
Across A Sea Of Stars by Unruly Marmite reviews
The year is 2823, and the dream of human unity across the Inner Sphere is dead. War, encompassing and ravenous, is the destiny of man, and the Great Houses rush to embrace it. But when a routine pirate hunting mission turns into First Contact with an alien race, that destiny might shift. For good or for ill, there may be worse things than mankind lurking among the stars.
Crossover - Mechwarrior/Battletech & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 11,249 - Reviews: 5 - Favs: 22 - Follows: 31 - Published: 2/12 - Shepard, Han'Gerrel, Rael'Zorah
Let There Be Light by Phorus Aedelmaer reviews
The Imperium of Man arrives in the Mass Effect galaxy, igniting war with the Citadel Council. As the Imperium sees only heresy, the Council scrambles to survive. The Reapers, faced with an empire that defies their cycle, prepare to adapt. With war looming, the fate of the galaxy hinges on whether diplomacy or extermination prevails.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 3 - Words: 5,794 - Reviews: 10 - Favs: 17 - Follows: 20 - Published: 1/29
The Reclaimer Wars:The Reaper Crisis by Johnnieboy11 reviews
Six months prior to the worst crisis the normal Milky Way would face, Commander Shepard hunts the Collectors abducting human colonists in the Terminus Systems when she comes upon a terrifying new sight:Three Intergalactic fleets arrayed against each-other and her sole Frigate. Three new factions, one seeking a home and two seeking answers, all linked by the Star Roads.
Crossover - Game X-overs & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 41 - Words: 226,973 - Reviews: 265 - Favs: 306 - Follows: 370 - Updated: 2/11 - Published: 4/26/2024 - Liara T'Soni, Tali'Zorah, Miranda L., Shepard
The Hero of Torfan and The Demon of Empire City by Mad Leprachaun reviews
She was an orphaned colonist turned soldier, and he was a bike courier turned messiah. Both suffered hardships. Faced down insurmountable odds, and won. Now, the weight of the galaxy rested on their shoulders. They were made strong, ruthless, all so when they face their destiny, they can make the impossible decisions, all for the common good. The galaxy depended on it.
Crossover - Mass Effect & inFAMOUS - Rated: M - English - Chapters: 13 - Words: 82,647 - Reviews: 11 - Favs: 65 - Follows: 97 - Updated: 2/10 - Published: 3/28/2023 - Shepard, Cole MacGrath
Mobile Suit - Mass Effect: The First Contact War by Mister Smallville reviews
Two worlds collide, neither prepared for the other. The Solar Sphere Congress -successor to the long gone Earth Federation- unwittingly starts a galactic crisis when it makes first contact with a very angry, very trigger happy Turian Hierarchy.
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 29 - Words: 183,608 - Reviews: 327 - Favs: 499 - Follows: 676 - Updated: 2/10 - Published: 8/7/2023
Rising from the Embers of Sera by thehappy reviews
The people of Sera rebuild, spreading to the stars. Wars will be waged. Peace will be sought. The Coalition has risen from the ashes to take their right to exist in the galaxy. They will survive...no matter the cost.
Crossover - Gears of War & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 31 - Words: 469,380 - Reviews: 638 - Favs: 811 - Follows: 954 - Updated: 2/8 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
Quintessence Effect Collective Rebirth by EvaShinobiKaiserKnight reviews
Two Years have passed since the Paladins and the Normandy had suffered the tragedy of loss. A year since the Altean's have begun to return to the galaxy after the second battle of the Citadel. But the Reapers are not done as the Paladins and a revived John Shepard must gather allies to face this threat. This is their Rebirth into a new world of wonders as Heroes. NOW FORM VOLTRON!
Crossover - Mass Effect & Voltron: Legendary Defender - Rated: M - English - Sci-Fi/Family - Chapters: 14 - Words: 170,464 - Reviews: 58 - Favs: 40 - Follows: 43 - Updated: 2/7 - Published: 8/11/2024 - [OC, Princess Allura] [Ashley W., Shepard]
Mass Effect: Web of Shadows by MacAndCheez reviews
Life was never easy for Edmond Willians, and neither was his demise, for as it turned out, Death itself made a mistake, which led to his premature demise, and so as a form of compensation, he's given the opportunity of reincarnating in any world of his choice alongside a boon choice. Now reincarnated as the soon-to-be legendary Commander Shepard, he will take the galaxy by storm.
Crossover - Mass Effect & Marvel - Rated: M - English - Adventure/Sci-Fi - Chapters: 3 - Words: 9,635 - Reviews: 15 - Favs: 40 - Follows: 55 - Updated: 2/6 - Published: 1/24 - Venom, Garrus V., Tali'Zorah, OC
Mass Effect: From Hell, We Have Come by Deathzealot reviews
The Terran Dominion, now under the control of Emperor Valerian was going to send a colonial expedition outside of the Koprulu Sector when something went wrong and the entire Expedition, along with an observing Emperor and his Guard, is sent to a whole new universe with the new technology called the Mass Effect. Still the people of this new universe are not ready! For Hell has come!
Crossover - StarCraft & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 25,850 - Reviews: 9 - Favs: 41 - Follows: 46 - Updated: 2/4 - Published: 1/28 - [Valerian M., Nova]
The Last Shinobi by derTraeumer reviews
Fifty thousand years ago, the shinobi world fell to the Reapers, their potential too great a threat. Akane Uchiha, the last surviving kunoichi, awakens in the modern galaxy on Eden Prime. Joining Commander Shepard's fight, she blends ancient ninja skills with advanced tech to preserve this cycle from annihilation and ensure no world shares her home's tragic fate.
Crossover - Naruto & Mass Effect - Rated: M - English - Tragedy/Mystery - Chapters: 43 - Words: 237,411 - Reviews: 61 - Favs: 205 - Follows: 256 - Updated: 2/4 - Published: 7/4/2019 - OC, Admiral Hackett, Shepard
As The Wind Abates by DingusMacGoo reviews
After witnessing the death of his oldest friend, an immortal Harry Potter turns to the stars in an attempt to find meaning in his life.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 41 - Words: 96,496 - Reviews: 337 - Favs: 1,080 - Follows: 1,501 - Updated: 2/2 - Published: 2/6/2024 - Harry P., J. Garson, Shepard
The N7 and Avatar by EclipsePheniox reviews
Commander Shepard and Avatar Korra have switched places. No one knows how or why, but one thing is for sure it's not good. Both the crew of the Normandy and Team Avatar must team up to solve the problem they both face. Korrasami, Shep/ Miranda. Teen, for now, possibly M later.
Crossover - Mass Effect & Legend of Korra - Rated: T - English - Sci-Fi/Fantasy - Chapters: 10 - Words: 26,488 - Reviews: 7 - Favs: 17 - Follows: 26 - Updated: 2/2 - Published: 3/19/2024 - Miranda L., Shepard, Korra, Asami S.
Sith Effect Episode II: The Skyllian Blitz by Metagray reviews
Having a seat on the council for almost two decades, the influence of the Sith has seeped into almost all aspects of Citadel space and has made them enemies within The Terminus Systems and Batarian Hegemony. John Shepard, Sith Apprentice, finds himself in this conflict with his loved ones at risk and only The Force to turn to in his darkest hour. Through Passion we gain Strength.
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 19,747 - Reviews: 117 - Favs: 802 - Follows: 1,070 - Updated: 2/1 - Published: 7/18/2024 - D. Anderson, Admiral Hackett, Shepard, Hannah S.
Super Robot Wars ME by Anhilliator1 reviews
The year is GC 0070. Nearly three decades have passed since the arrival of the Systems Alliance shook the wider galaxy to its core. While the fires of war within the Alliance have died down, the embers still burn, many beyond the borders of Alliance Space, threatening to ignite once more. And in the background, an ancient threat begins to stir.
Crossover - Mass Effect & Super Robot Wars - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 1,344 - Reviews: 3 - Favs: 7 - Follows: 9 - Published: 2/1 - Shepard, OC
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